Compressor



March 31, 1936. W, W. WILLIAMS 2,035,854

COMPRES SOR Filed June 1l. 1954 A TTORNEY.

UNITED ysrliflls Patented Mar. 31, 1936 'PATENT OFFICE" COMPRESSOR A*Walter vW. Williams, Bloomington, Ill. Application June 11, 1934, SerialNo. '130,022

6 Claims.

This invention relates to improvements in compressors and moreparticularly to compressors for use in the compression type ofrefrigeration apparatus.

It is an object of this invention to provide an improved valve incompressors employed in comv pressing the gaseous refrigerant in acompression type of refrigerating apparatus which are simple inconstruction, positive in action, and substantially noiseless inoperation. While these improved valves may be most advantageously'employed for the purpose above described, it is to be understood thatthe invention is not limited to this application.

With these and other objects in view, reference is made to-theaccompanying sheet of drawing which illustrates a preferred embodimentof this invention with the understanding that -minor changes may be madewithout departing from the scope thereof. i" s In the drawing:

Figure 1 is a view in vertical central section of a compressorillustrating a preferred embodiment of this invention.

Figure 2 is an enlarged fragmentary detail View, similar to Figure 1.

Figure 3 is a. projected view in perspective, illustrating the variousparts of this improved valve.

Figure 4 is an enlarged detail view in perspective of the valve spring.

The embodiment of this invention illustrated in Figure 1 includes atwo-cylinder -compressor block I mounted upon a crank-case 2 and closedby a head 3. 'Ihe upper ends of the compression cylinders 4 are closedby a valve plate 5 secured between the block I and head 3.

'I'he piston 6 mounts the usual connecting rod 1 and the upper closedend 8 is preferably provided with a plurality of circular ports 9, thecenters of which are arranged upon a circle concentric with the axis ofthe piston. A plurality of thin, flexible metal annuli I0, concentricwith the axis vof the piston, are positioned by an undercut circularplate II secured concentric with the axis of the piston to the closure 8which positions the said annuli to cover the ports 9 to form a laminatedvalve therefor. It is preferable to enlargethe opening of each port 9under the laminated valve by providing an annular groove 9il upon theupper surface of the closure 8 into which the ports 9 open and likewiseprovide annular grooves I2 and I3 of a similar depth uponthe uppersurface of the closure 8 spaced apart on each side port groove 9B,whereby the laminated valve seats upon the spaced-apart annular surfacesI4 ofthe end closure 8 on the opposite sides of the groove 9". Thecylindrical centering "plate II is preferably secured to the closure 8by the threaded bolt I5 and nut |58; The lower 5 circumference of theplate II is undercut at I6 a suillcient distance to allow a slightmovement to the laminated valve annuli III to unseat said valves uponthe down or intake stroke ofthe piston. The centeringplatell is alsopreferably I provided with a plurality of circular ports I1, arrangedupon the arc of the circle concentric with the axis of the piston, whichopen into the annular groove I3, whereby, when the laminated valve IIJis unseated 'during the downward movel5 ment of the piston, the uid maypass over the annular seat I4 of the ports 9 to enter the groove I3 andbe discharged therefrom through the port I1.

It is preferableto provide the valve plate 20 with a depression I8 uponthe underside thereof adapted to receive therein the'centering plate IIupon each'piston when the piston has completed its upward or compressionstroke, as shown in Figure 1. lThe valve plate 5 is provided with a 25plurality of circular ports I9, the centers of which are arranged upon acircle concentric with the axisof the piston, which ports I 9 arepreferably formed of the same size as the ports 9 and arranged at thesame distance from the axis of the piston. The upper surface of theplate 5 is cut out to provide an annular groove 20 into which the portsI8 open, and the upper surface is likewise provided with annular grooves2| and 22, of the same depth, spaced apart on each. side of the portgroove 20, providing annular seats 23 on each side thereof. A pluralityof thin, flexible metal annuli 24 are centered over the ports I9 by anundercut centering plate 25 preferably secured to the upper surface ofthe valve plate 5 by the axial bolt 26 with the nut 21 threaded on theupper side thereof. The centering plate 25 is preferably of the sameradius as the greatest radius of the laminated valve 24. The undercutportion 28 of the centering plate 25 is cut out a suflicient distance toallow an annular disc valve spring 28 of the same dimensions as theannuli 24 to be interposed between the said annuli 24 forming thelaminated valve and the overlapping portion 28 of the centering plate25. I'he cencate with the nannular groove 22 upon the upper surface ofthe valve plate i.

A disc valve spring 29 is preferably interposed -between the overlap 28andthe laminated valve,

body of the disc valve spring 29, whereby the spring lingers 3| normallymaintain the laminated metal annuli 24 seated about the ports I9. Uponthe compression or upward stroke of the piston, the fluid thereabovepasses through the ports 9, compresses the spring fingers 9|, and passesover the seats 23 into the groove 2| upon the exterior of the valve andinto the groove 22 and through the ports 30, communicating therewith,and upon the downward stroke of the piston the spring fingers 3|immediately cause the laminated valve to seat.

'I'he laminated valve on the valve plate, in combination with the discvalve spring, forms a self-seating valve upon the initiation of thestroke of the piston away from the valve plate. The annuli 24 formingthe laminated valve being of very thin, ilexible metal and having athreepoint engagement with the disc valve spring 29 at the points ofcontact of the free ends of each of the three iingers 3|, upon thestroke of the piston in the direction ci the valve plate allows aflexing of the annuli and produces a lapping effect in the valve. n

What I claim is:

1. In a compressor, the combination oi' a valved piston, a-cylinder, avalve plate having a plurality of circular ports therein arranged withtheir respective centers on a circle concentric with the cylinder, anannular laminated valve disc adapted to close said ports on the side o!the plate oppositethe piston, a centering plate for the valve discmounted on the valve plate having an undercut overhang extendingcompletely thereover to limit the axial movement of the valve disc, andan annular spring member of substantially the same width as the plateinterposed between the valve disc and centering plate, wherein the valveplate is provided with annular grooves on each side of the ports on thevalve side forming annular seats for the laminated valve disc.

2. In a valve ior the compressor of a compression type refrigeratingmachine, the combination oi' a valve plate closing the compression endof the cylinder, said plate having a plurality of circular portsarranged with their respective centers on a circle concentric with thecylinderl annular valve seats on each side of the circle of ports, athin, iiexible, annular valve disc mounted to seat on said ports to belapped over each seat upon the suction stroke of the piston.

y3. 'I 'he structure of claim 2 wherein a valve centering and limitingmember is mounted on the valve plate.

4. The structure oi claim 2 wherein a valve centering and hunting memberis mounted on the valve plate, and a spring member is interposed betweenthe valve disc and valve limiting member.

5. In a valve for the compressor of a compression type refrigeratingmachine, ,the combination of a valve plate closing the compression endof the cylinder, said plate having a plurality of circular portsarranged with their respective centers on a circle'concentric with thecylinder, annular valve seats on eachside or the circle of ports, a nestof thin, iiexlble, annular valve discs mounted to seat on said ports andbe lapped over each seat upon the suction stroke of the piston.

6. The structure oi' claim 5 wherein a valve centering and limitingmember is mounted on the valve plate and a spring member is interposedbetween the nest of thin, flexible valve discs and the valve limitingmember.

WALTER W. WILLIAMS.

